Hi, please upgrade to a supported postgresql version and try it again and report back in this issue (we can reopen it if the problem persists). To know the supported versions, please check https://dev.xwiki.org/xwiki/bin/view/Community/SupportStrategy/DatabaseSupportStrategy

See also https://dba.stackexchange.com/questions/227074/failed-to-populate-indices-of-table-table-name